Only key needed for TA082's to run 150 IPL is:
The following keys (although done in downgrader) are not needed and have been tested by at least 2 people:
0x0005 (Although had been suspected to be bricker it is 100% safe to downgrade as of THEMAN's tests)
Those keys are all 100% safe.
Expect sometime soon a TA082 Restorer to restore keys not responsible for brick (Probably released tomorrow + src) then a modified TA082 downgrader (probably tomorrow)
Credits: Stapol, codes02, Mathieulh, jas0nuk, THEMAN *Nearly bricked PSP twice*, and Dark_AleX aswell as harleyg
IdStorageWriters Code: Usbhostfs Recovery: jas0nuk and Stapol
Original Dumper (Not used as of v1.1): TUW
IdStorageWriters for other keys (Totally recoded with checks): Stapol, codes02
Doesn't contain full keys so not illegal.